GB208564A - - Google Patents

Abstract

Abstract 208,564. Compagnie d'Exploitation des ProcÚdÚs de Photographies en Couleurs L. Dufay. May 19, 1922, [Convention date]. Colour photography; films with multiple colour-sensitive layers.-In a process for producing colour photographs by printing from opposite sides, through colour component negatives, on a film of the kind comprising two emulsion layers of different chromatic sensitiveness coated on opposite sides of a transparent support, and in which the layers are coloured for the purpose of preventing the printing-light for one layer from penetrating through the support to the other layer, the layers are, for this purpose, impregnated with tartrazine, which is subsequently removed by washing. Reference has been directed by the Comptroller to Specification 13430/15.

Inventors

No inventors recorded.

Bibliographic Details